hi,in case the lost storage is programs,i don't know of any software that knows what programs you want to keep and don't want to keep.you could start with turning off and then back on the [restart computer]system restore .as for your term .exe's every program on your computer has a.exe to run the program
as for must have downloads that sounds like a folder you created yourself,only you know if you want to get rid of them Me i would burn that one to disk and delete it from the hdd for the space.
check out ATF cleaner also
caperjack 875 I hate 20 Questions Team Colleague
caperjack 875 I hate 20 Questions Team Colleague
caperjack 875 I hate 20 Questions Team Colleague
caperjack 875 I hate 20 Questions Team Colleague
caperjack 875 I hate 20 Questions Team Colleague
caperjack 875 I hate 20 Questions Team Colleague